require 'rbvmomi';
credentials = { :host => "192.168.1.10", :user => "administrator@vsphere.local", :password => "vmware", :insecure => true };
vim = RbVmomi::VIM.connect(credentials);
datacenters = {};
vim.rootFolder.childEntity.each { |datacenter|
  datacenter_info = {}
  datacenter.hostFolder.childEntity.each { |cluster|
    cluster_info = {}
    cluster.host.each { |host|
      host_info = {}
      host.config.network.vnic.each { |vnic|
        vnic_info = {}
        vnic_info[:portgroup] = vnic.portgroup
        vnic_info[:dhcp_enabled] = vnic.spec.ip.dhcp
        vnic_info[:ip_address] = vnic.spec.ip.ipAddress
        vnic_info[:subnet_mask] = vnic.spec.ip.subnetMask
        host_info[vnic.device.to_sym] = vnic_info
      }
      cluster_info[host.name.to_sym] = host_info
    }
    datacenter_info[cluster.name.to_sym] = cluster_info
  }
  datacenters[datacenter.name.to_sym] = datacenter_info
};
datacenters